Both Miley Cyrus & Katy Perry took major chances by covering unpredictable song choices while on tour this week! Miley ramped up the crowd by performing Nirvana's hit tune Smells Like Teen Spirit during her Ecuador tour stop while Katy decided to sing her own rendition of Rebecca Black's song Friday. Which starlet had the best cover though!? We're breaking down both performances in this edition of the Hollywire Hot Minute!